摘要
采用高温原位拉伸实验台对网状构型TiBw/TA15复合材料的高温变形行为进行了观察,分析了裂纹的萌生扩展行为,研究了复合材料在700℃拉伸变形过程中构型设计的强韧化机制。研究结果表明,TiBw/TA15复合材料的高温变形断裂机制以基体中α相的塑性变形以及β相的断裂为主,随后引起TiB晶须的断裂和脱粘。通过高温下TiBw/TA15复合材料裂纹扩展行为的原位观察,建立了描述网状构型TiBw/TA15变形断裂模型。
The deformation behavior of TiBw/TA15 with quasi-continuous network microstructure was investigated by using in-situ tensile test at 700℃.The nucleation,propagation and merger of micro cracks were analyzed.The strengthening and toughening mechanisms of network microstructure were investigated.The plastic deformation ofαphase,the fracture ofβphase and the following fracture/decohesion of TiBw dominated the deformation/fracture behavior of the network composite.The fracture model was established with analysis on four crack propagation paths,based on in-situ tensile test results.
作者
陈斌
高翔
王欢
彭华新
CHEN Bin;GAO Xiang;WANG Huan;PENG Huaxin(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2022年第2期199-204,共6页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51731009)
国家重点研发计划资助项目(2017YFB0703100)。
关键词
钛基复合材料
高温力学性能
原位拉伸实验
网状构型
非均匀分布
Titanium matrix composite(TMC)
Elevated temperature mechanical properties
In situ tensile test
Network architecture
Inhomogeneous distribution
